Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size for CBSA of Origin: 2002
Monday, July 2, 2012
Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size for CBSA of Origin: 2002
[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]
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All modes
Shipment Weight |
Value |
Tons |
Ton-miles |
CV of average miles per shipment |
CV |
Std. error of percent |
CV |
Std. error of percent |
CV |
Std. error of percent |
All shipment sizes |
17.0 |
– |
14.6 |
– |
25.7 |
– |
12.0 |
Less than 50 lbs |
12.3 |
1.9 |
9.8 |
– |
20.0 |
0.2 |
10.5 |
50 to 99 lbs |
12.8 |
0.4 |
14.9 |
– |
17.2 |
– |
19.9 |
100 to 499 lbs |
19.8 |
1.7 |
13.5 |
0.2 |
27.9 |
0.5 |
15.3 |
500 to 749 lbs |
16.9 |
0.2 |
10.9 |
0.1 |
16.1 |
– |
15.0 |
750 to 999 lbs |
26.0 |
0.3 |
15.7 |
– |
24.1 |
– |
15.0 |
1,000 to 9,999 lbs |
25.5 |
1.4 |
14.7 |
1.4 |
16.5 |
1.7 |
11.4 |
10,000 to 49,999 lbs |
27.1 |
2.5 |
9.8 |
4.8 |
23.3 |
5.7 |
12.7 |
50,000 to 99,999 lbs |
25.5 |
1.4 |
21.1 |
3.1 |
18.8 |
3.0 |
13.6 |
100,000 lbs or more |
24.1 |
2.3 |
20.3 |
5.0 |
35.9 |
7.1 |
21.6 |
Single modes
Shipment Weight |
Value |
Tons |
Ton-miles |
CV of average miles per shipment |
CV |
Std. error of percent |
CV |
Std. error of percent |
CV |
Std. error of percent |
All shipment sizes |
19.2 |
– |
15.2 |
– |
27.2 |
– |
29.4 |
Less than 50 lbs |
27.1 |
1.0 |
20.7 |
– |
24.8 |
– |
41.4 |
50 to 99 lbs |
23.3 |
0.3 |
22.9 |
– |
14.6 |
– |
30.4 |
100 to 499 lbs |
15.2 |
1.3 |
13.8 |
0.2 |
32.6 |
0.4 |
19.3 |
500 to 749 lbs |
16.6 |
0.2 |
11.5 |
0.1 |
17.4 |
– |
13.9 |
750 to 999 lbs |
28.8 |
0.4 |
15.4 |
– |
26.6 |
– |
14.6 |
1,000 to 9,999 lbs |
27.3 |
1.4 |
14.5 |
1.4 |
18.4 |
1.7 |
12.9 |
10,000 to 49,999 lbs |
27.3 |
2.7 |
9.9 |
5.0 |
23.9 |
6.3 |
12.6 |
50,000 to 99,999 lbs |
25.3 |
1.8 |
22.1 |
3.4 |
21.3 |
3.5 |
13.4 |
100,000 lbs or more |
24.8 |
2.6 |
21.1 |
5.0 |
37.4 |
7.4 |
21.7 |
Truck
Shipment Weight |
Value |
Tons |
Ton-miles |
CV of average miles per shipment |
CV |
Std. error of percent |
CV |
Std. error of percent |
CV |
Std. error of percent |
All shipment sizes |
21.0 |
– |
15.7 |
– |
13.2 |
– |
23.2 |
Less than 50 lbs |
29.6 |
0.8 |
22.2 |
– |
28.2 |
– |
47.9 |
50 to 99 lbs |
23.3 |
0.3 |
23.6 |
– |
18.0 |
– |
34.6 |
100 to 499 lbs |
15.3 |
1.3 |
14.0 |
0.2 |
33.9 |
0.4 |
20.0 |
500 to 749 lbs |
15.7 |
0.2 |
11.5 |
0.1 |
18.1 |
– |
15.1 |
750 to 999 lbs |
29.1 |
0.6 |
15.7 |
– |
27.4 |
– |
14.6 |
1,000 to 9,999 lbs |
24.9 |
1.5 |
14.3 |
1.3 |
17.7 |
1.7 |
13.0 |
10,000 to 49,999 lbs |
27.4 |
2.8 |
9.8 |
6.2 |
24.0 |
7.0 |
12.5 |
50,000 to 99,999 lbs |
23.8 |
1.6 |
22.2 |
3.4 |
21.1 |
3.3 |
13.4 |
100,000 lbs or more |
22.3 |
1.2 |
25.5 |
4.7 |
24.2 |
5.3 |
12.7 |
Rail
Shipment Weight |
Value |
Tons |
Ton-miles |
CV of average miles per shipment |
CV |
Std. error of percent |
CV |
Std. error of percent |
CV |
Std. error of percent |
All shipment sizes |
35.9 |
– |
48.4 |
– |
S |
S |
12.6 |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
50 to 99 lbs |
– |
– |
– |
– |
– |
– |
– |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
S |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
750 to 999 lbs |
– |
– |
– |
– |
– |
– |
– |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
36.1 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
49.3 |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
28.7 |
100,000 lbs or more |
S |
S |
49.0 |
3.4 |
S |
S |
12.1 |
All other Single modes
Shipment Weight |
Value |
Tons |
Ton-miles |
CV of average miles per shipment |
CV |
Std. error of percent |
CV |
Std. error of percent |
CV |
Std. error of percent |
All shipment sizes |
10.9 |
– |
23.6 |
– |
48.8 |
– |
5.9 |
Less than 50 lbs |
34.0 |
4.9 |
20.9 |
7.8 |
23.9 |
7.6 |
3.4 |
50 to 99 lbs |
32.3 |
1.8 |
S |
S |
38.0 |
1.1 |
49.2 |
100 to 499 lbs |
28.2 |
2.8 |
30.9 |
1.5 |
28.7 |
2.6 |
15.1 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
21.3 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
33.7 |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
23.2 |
10,000 to 49,999 lbs |
S |
S |
S |
S |
S |
S |
34.5 |
50,000 to 99,999 lbs |
42.1 |
0.1 |
39.3 |
0.1 |
41.2 |
– |
23.9 |
100,000 lbs or more |
20.1 |
9.5 |
23.8 |
14.8 |
S |
S |
S |
Multiple modes
Shipment Weight |
Value |
Tons |
Ton-miles |
CV of average miles per shipment |
CV |
Std. error of percent |
CV |
Std. error of percent |
CV |
Std. error of percent |
All shipment sizes |
12.4 |
– |
33.9 |
– |
30.0 |
– |
4.8 |
Less than 50 lbs |
11.5 |
5.1 |
16.3 |
7.9 |
22.4 |
7.3 |
4.6 |
50 to 99 lbs |
18.3 |
2.0 |
15.5 |
2.5 |
19.7 |
1.8 |
11.0 |
100 to 499 lbs |
39.8 |
5.1 |
24.5 |
8.5 |
34.0 |
8.2 |
10.9 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
S |
750 to 999 lbs |
32.3 |
0.2 |
44.8 |
0.4 |
S |
S |
28.1 |
1,000 to 9,999 lbs |
34.2 |
0.4 |
S |
S |
S |
S |
S |
10,000 to 49,999 lbs |
45.9 |
0.3 |
S |
S |
S |
S |
S |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
29.8 |
Parcel, USPS or courier
Shipment Weight |
Value |
Tons |
Ton-miles |
CV of average miles per shipment |
CV |
Std. error of percent |
CV |
Std. error of percent |
CV |
Std. error of percent |
All shipment sizes |
13.0 |
– |
15.0 |
– |
21.1 |
– |
4.8 |
Less than 50 lbs |
11.6 |
5.3 |
16.3 |
5.0 |
22.4 |
6.5 |
4.6 |
50 to 99 lbs |
18.3 |
2.1 |
15.5 |
1.5 |
19.7 |
1.9 |
11.0 |
100 to 499 lbs |
39.8 |
5.1 |
24.6 |
5.3 |
34.1 |
7.5 |
10.9 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
42.1 |
750 to 999 lbs |
33.1 |
0.2 |
45.3 |
1.6 |
S |
S |
30.3 |
1,000 to 9,999 lbs |
S |
S |
S |
S |
S |
S |
29.7 |
10,000 to 49,999 lbs |
– |
– |
– |
– |
– |
– |
– |
50,000 to 99,999 lbs |
– |
– |
– |
– |
– |
– |
– |
100,000 lbs or more |
– |
– |
– |
– |
– |
– |
– |
All other multiple modes
Shipment Weight |
Value |
Tons |
Ton-miles |
CV of average miles per shipment |
CV |
Std. error of percent |
CV |
Std. error of percent |
CV |
Std. error of percent |
All shipment sizes |
28.2 |
– |
S |
S |
48.9 |
– |
S |
Less than 50 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
50 to 99 lbs |
– |
– |
– |
– |
– |
– |
– |
100 to 499 lbs |
S |
S |
S |
S |
S |
S |
33.9 |
500 to 749 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
750 to 999 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
1,000 to 9,999 lbs |
42.2 |
9.3 |
S |
S |
S |
S |
S |
10,000 to 49,999 lbs |
45.9 |
11.5 |
S |
S |
S |
S |
S |
50,000 to 99,999 lbs |
S |
S |
S |
S |
S |
S |
31.6 |
100,000 lbs or more |
S |
S |
S |
S |
S |
S |
29.8 |
Other and unknown modes
Shipment Weight |
Value |
Tons |
Ton-miles |
CV of average miles per shipment |
CV |
Std. error of percent |
CV |
Std. error of percent |
CV |
Std. error of percent |
All shipment sizes |
31.0 |
– |
29.3 |
– |
S |
S |
S |
Less than 50 lbs |
S |
S |
37.9 |
0.8 |
45.9 |
0.4 |
S |
50 to 99 lbs |
S |
S |
S |
S |
S |
S |
S |
100 to 499 lbs |
S |
S |
46.9 |
1.7 |
S |
S |
S |
500 to 749 lbs |
S |
S |
38.9 |
1.0 |
49.6 |
1.0 |
S |
750 to 999 lbs |
43.4 |
1.3 |
S |
S |
45.9 |
0.1 |
37.5 |
1,000 to 9,999 lbs |
23.3 |
10.1 |
42.6 |
13.4 |
48.0 |
16.2 |
31.2 |
10,000 to 49,999 lbs |
48.3 |
2.9 |
48.6 |
6.5 |
S |
S |
S |
50,000 to 99,999 lbs |
S |
S |
46.7 |
7.5 |
S |
S |
30.6 |
100,000 lbs or more |
49.3 |
6.1 |
S |
S |
S |
S |
31.5 |
KEY:
– Represents data cell equal to zero or less than
1 unit of measure.
S Estimate does not meet publication standards because of high sampling
variability or poor response quality.
CV Coefficient of variation of number
NOTE: The Introduction and appendixes give
information onf confidentiality protection, sampling error, nonsampling
error, sample design, and definitions.
Links to this information on the Internet may be found at www.census.gov/cfs.
SOURCE: Bureau of Transportation Statistics (USDOT)
and U.S. Census Bureau, 2002 Commodity Flow Survey, Metropolitan Data,
December 2004.